#include<iostream>
#include<iomanip>
using namespace std;

int main()
{
	double days, peach;
	double half_peach = 0;
	int i;
	days = 9;
	i = 0;
	peach = 2;
	double stop = 1;

	double k = 1;
	while (stop)
	{
		half_peach = peach;
		while (i < days)
		{
			i++;
			half_peach = half_peach / 2 - 1;
		}
		if (half_peach == 1)
		{
			stop = 0;
			cout << "peach:" << peach;
		}
		else
		{
			i = 0;
			peach++;
		}
	}
	int key;
	cin >> key;

	return 0;

}